The survey by NSF International, a developer of public health standards and certification programs, found that 42 percent of those who went to work sick said they didn't want to miss deadlines or were afraid that they wouldn't be able to catch up if they took a sick day.

According to UPI, the survey also found that 98 percent of Americans judged their co-workers who come in sick. The survey showed that 67 percent said they considered sick co-workers to be hard workers, while 16 percent called them selfish or uncaring about their co-workers' well-being.

According to the survey, 33 percent of U.S. men said they always go to work when sick, compared with 17 percent of women.